Assionob to the



Patented May 21,1929.

UNITED STATES PATENT OFFICE.

Emir c. LOUDENBECK, or wrnxmsnuae, PENNSYLVANIA, assrenon To run wns'rmenonsn am BRAKE company, or wrmmnnmc, rnnnsnvanm, A

CORPORATION OF PENNSYLVANIA.

GASKET AND PIE GUESS OF TREATING.

Ho Drawing.

This invention relates toaskets, and more and what is termed bloom forms on the surfaces of the gasket and tends to interfere with the gasket making a leak tight seat;

The principal object of my invention is to provide a rubber composition gasket so treated that aging is retarded and blooming is reduced. In order to accomplish the desired end, I provide a bath of melted wax, preferably parafiine wax, and preferably heated to a tem perature of from 200 to 250 degrees Fahrenheit. The gaskets to be treated are dipped in this bath and allowed to remain therein for a period of preferably three tofive minutes. The gaskets are then removed from the bath and the excess. wax is lremoved, preferably by.

may be present on the old gaskets is washed oil? in the bath.

Application filed December 20, 1926. Sgial No.156,066.

It has been found after severe service tests that the treatment retards aging and prevents the formation of bloom on the gasket. At the same time, the treatment does not have any detrimental effect on the gaskets. The gaskets are also rendered more pliable and the treatment tends to prevent sticking of the gaskets on metal surfaces to which the gasket may be' applied.

Having now described my invention, what 1 I claim as new and desire to secure by Letters 40 Patent, is j 1. The method of treating composition rubber gaskets which consists in dippin the gaskets in a bath of parafiine wax heate to a flemperature from 200 to 250 degrees Fahreneit. 1

2. The' method of treating composition rubber gaskets which consists in dippin the gaskets in a bath of melted wax heate to a temperature of from 200 to 250 degrees Fahrenheit and allowing the gaskets to remain in the bath for a period of from three to five minutes.

In testimony whereof I have hereuntov set my hand.

HARRY c. LOUDENBECK. 

